Examlex
Name two widespread human practices cited in the textbook that are major contributors to the rising levels of so-called "greenhouse gases" in the atmosphere.
Serotonin
A neurotransmitter involved in regulating mood, sleep, appetite, and pain.
Norepinephrine
A neurotransmitter and hormone involved in the body’s fight-or-flight response, affecting attention and responding actions.
Depressed Mood
A state of persistent sadness, a key symptom of depression that can affect a person's thoughts, behavior, feelings, and sense of well-being.
Neurotransmitter
Chemical substances in the nervous system that transmit signals across a synapse from one neuron to another.
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